from The Century Dictionary and Cyclopedia

n. Specifically A barbarous mixed speech, without literary monuments; a rude language resulting from the mixture of two or more discordant languages, especially of a cultivated language with a barbarous one: as, the Chinook jargon; the jargon called Pidgin-English.

n. Any phraseology peculiar to a sect, profession, trade, art, or science; professional slang or cant.

n.Synonyms Chatter, Babble, etc. See prattle, n.

n. A colorless, yellowish, or smoky variety of the mineral zircon from Ceylon.